During development, full screen display, custom titles (using buttons and other controls), and other requirements are often required. Today we will talk about how to control the form display of Android applications.
First, we will introduce an important method: requestWindowFeature (featrueId). Its function is to enable extended form features. A parameter is a constant defined in the Window class.
I. Enumeration Constants
1. DEFAULT_FEATURES: default system status, which is not required
2. FEATURE_CONTEXT_MENU: Enable ContextMenu. This option is enabled by default. Generally, you do not need to specify
3. FEATURE_CUSTOM_TITLE: Custom title. You must specify a custom title. For example, when the title is a button
4. FEATURE_INDETERMINATE_PROGRESS: uncertain progress
5. FEATURE_LEFT_ICON: icon on the left of the title bar
6. FEATURE_NO_TITLE: Wu title
7. FEATURE_OPTIONS_PANEL: enables the option panel function. It is enabled by default.
8. FEATURE_PROGRESS: Progress indicator Function
9. FEATURE_RIGHT_ICON: icon on the right of the title bar
Lock the screen direction when the Activity is running
Xml Code
<Activity android: name = ". EX01 ″
Android: label = "@ string/app_name"
Android: screenOrientation = "portrait" // portrait screen, landscape screen when the value is landscape
............
</Activity>
Full Screen Activity
To make an Activity run in full screen mode, you can add the following code in its onCreate () method:
Java code
// Set full screen mode
GetWindow (). setFlags (WindowManager. LayoutParams. FLAG_FULLSCREEN,
WindowManager. LayoutParams. FLAG_FULLSCREEN );
// Remove the title bar
RequestWindowFeature (Window. FEATURE_NO_TITLE );
Add the progress bar to the Title of the Activity:
Implementation Code:
Java code
// Unclear progress bar
RequestWindowFeature (Window. FEATURE_INDETERMINATE_PROGRESS );
SetContentView (R. layout. main );
SetProgressBarIndeterminateVisibility (true );
// Clear the progress bar
RequestWindowFeature (Window. FEATURE_PROGRESS );
SetContentView (R. layout. main );
SetProgress (5000 );
When using this function, we first need to declare it before setContentView:
RequestWindowFeature (Window. FEATURE_INDETERMINATE_PROGRESS );
Call setProgressBarIndeterminateVisibility (true); to display the progress,
Call setProgressBarIndeterminateVisibility (false) When stopping );